Anchor



FIG. 1 is a perspective view of a anchor showing my new design, the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a right side elevational view which is a mirror image of the left side;

FIG. 3 is a bottom plan view;

FIG. 4 is a top plan view; and,

FIG. 5 is a front elevational view which is a mirror image of the rear view. 

The ornamental design for an anchor, as shown and described. 